An exploitable integer overflow exists in the Joyent SmartOS 20161110T013148Z Hyprlofs file system.

published 2016-12-14 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-9853

cvss: 7.8; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits: 0; none known

An exploitable integer overflow exists in the Joyent SmartOS 20161110T013148Z Hyprlofs file system. The vulnerability is present in the Ioctl system call with the command HYPRLOFS_ADD_ENTRIES when dealing with 32-bit file systems. An attacker can craft an input that can cause a kernel panic and potentially be leveraged into a full privilege escalation vulnerability. This vulnerability is distinct from CVE-2016-8733.

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

talosintelligence.com http://www.talosintelligence.com/reports/TALOS-2016-0249/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.0	7.8	CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
NVD	2.0	6.9	AV:L/AC:M/Au:N/C:C/I:C/A:C

Affected products

Joyent SmartOS

Classification

Weakness

CWE-190 Integer Overflow or Wraparound

References

talosintelligence.com /reports/TALOS-2016-0249/
exploit, third-party-advisory, vdb-entry
securityfocus.com /bid/94921
vdb-entry, broken-link, third-party-advisory

Sources

CVE List CVE-2016-9031
NVD CVE-2016-9031

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary